diff --git a/include/global_info.hpp b/include/global_info.hpp
index e0047a8..92ed2f3 100644
--- a/include/global_info.hpp
+++ b/include/global_info.hpp
@@ -59,8 +59,8 @@ public:
                                                 namespace_stack_({&global_info.global_namespace_}) {}
 
     template<typename T>
-    std::optional<T*> FindSomething(const std::optional<std::vector<std::string>>& path,
-                                    std::function<std::optional<T*>(NamespaceInfo*)> search_func);
+    std::optional<T> FindSomething(const std::optional<std::vector<std::string>>& path,
+                                    std::function<std::optional<T>(NamespaceInfo*)> search_func);
 
     std::optional<NamespaceInfo*> FindNamespaceIn(NamespaceInfo* current_namespace,
                                                   const std::vector<std::string>& path);
@@ -74,22 +74,25 @@ public:
     return NamespaceVisitor(*this);
   }
 
+  // TODO: remember about vector realloc
   FunctionInfo* GetFunctionInfo(utils::IdType id) {
-    return functions_.GetValue(id);
+    return &functions_[id];
   }
 
+  // TODO: remember about vector realloc
   TypeInfo* GetTypeInfo(utils::IdType id) {
-    return types_.GetValue(id);
+    return &types_[id];
   }
 
+  // TODO: remember about vector realloc
   TypeclassInfo* GetTypeclassInfo(utils::IdType id) {
-    return typeclasses_.GetValue(id);
+    return &typeclasses_[id];
   }
 
 private:
-  utils::Storage<FunctionInfo*> functions_;
-  utils::Storage<TypeInfo*> types_;
-  utils::Storage<TypeclassInfo*> typeclasses_;
+  std::vector<FunctionInfo> functions_;
+  std::vector<TypeInfo> types_;
+  std::vector<TypeclassInfo> typeclasses_;
 
   NamespaceInfo global_namespace_;
   std::vector<ImportInfo> imports_;
diff --git a/include/type_graph.hpp b/include/type_graph.hpp
index ea5b7a6..78e8937 100644
--- a/include/type_graph.hpp
+++ b/include/type_graph.hpp
@@ -1,3 +1,5 @@
+#pragma once
+
 #include <vector>
 #include <unordered_set>
 #include <unordered_map>
diff --git a/include/utils.hpp b/include/utils.hpp
index 5313b3b..c8135b9 100644
--- a/include/utils.hpp
+++ b/include/utils.hpp
@@ -1,3 +1,5 @@
+#pragma once
+
 #include <endian.h>
 #include <vector>
 #include <unordered_map>
diff --git a/src/.global_info.cpp.kate-swp b/src/.global_info.cpp.kate-swp
deleted file mode 100644
index a2a7ac1..0000000
Binary files a/src/.global_info.cpp.kate-swp and /dev/null differ
diff --git a/src/global_info.cpp b/src/global_info.cpp
index edf7847..dbf1a42 100644
--- a/src/global_info.cpp
+++ b/src/global_info.cpp
@@ -50,36 +50,78 @@ void GlobalInfo::NamespaceVisitor::ToGlobalNamespace() {
 
 utils::IdType GlobalInfo::NamespaceVisitor::AddFunctionDeclaration(const std::string& name,
     FunctionDeclarationInfo&& function_declaration_info) {
-  FunctionInfo* function_info = &namespace_stack_.back()->functions[name];
+  size_t id = 0;
 
-  function_info->declaration = std::move(function_declaration_info);
+  auto function_id_iter = namespace_stack_.back()->functions.find(name);
 
-  return global_info_.functions_.GetId(function_info);
+  if (function_id_iter == namespace_stack_.back()->functions.end()) {
+    id = global_info_.functions_.size();
+    namespace_stack_.back()->functions[name] = id;
+    global_info_.functions_.emplace_back();
+    global_info_.functions_.back().declaration = std::move(function_declaration_info);
+  } else {
+    id = function_id_iter->second;
+    global_info_.functions_[id].declaration = std::move(function_declaration_info);
+  }
+
+  return id;
 }
 
 utils::IdType GlobalInfo::NamespaceVisitor::AddFunctionDefinition(const std::string& name,
     FunctionDefinitionInfo&& function_definition_info) {
-  FunctionInfo* function_info = &namespace_stack_.back()->functions[name];
+  size_t id = 0;
 
-  function_info->definition = std::move(function_definition_info);
+  auto function_id_iter = namespace_stack_.back()->functions.find(name);
 
-  return global_info_.functions_.GetId(function_info);
+  if (function_id_iter == namespace_stack_.back()->functions.end()) {
+    id = global_info_.functions_.size();
+    namespace_stack_.back()->functions[name] = id;
+    global_info_.functions_.emplace_back();
+    global_info_.functions_.back().definition = std::move(function_definition_info);
+  } else {
+    id = function_id_iter->second;
+    global_info_.functions_[id].definition = std::move(function_definition_info);
+  }
+
+  return id;
 }
 
 utils::IdType GlobalInfo::NamespaceVisitor::AddType(const std::string& type,
                                                     TypeInfo&& type_info) {
-  namespace_stack_.back()->types[type] = std::move(type_info);
+  size_t id = 0;
+
+  auto function_id_iter = namespace_stack_.back()->functions.find(type);
+
+  if (function_id_iter == namespace_stack_.back()->functions.end()) {
+    id = global_info_.types_.size();
+    namespace_stack_.back()->functions[type] = id;
+    global_info_.types_.push_back(std::move(type_info));
+  } else {
+    // error
+  }
+
+  return id;
 }
 
 utils::IdType GlobalInfo::NamespaceVisitor::AddTypeclass(const std::string& typeclass,
                                                          TypeclassInfo&& typeclass_info) {
-  namespace_stack_.back()->typeclasses[typeclass] = std::move(typeclass_info);
+  size_t id = 0;
 
-  return global_info_.functions_.GetId(typeclass_info);
+  auto function_id_iter = namespace_stack_.back()->functions.find(typeclass);
+
+  if (function_id_iter == namespace_stack_.back()->functions.end()) {
+    id = global_info_.typeclasses_.size();
+    namespace_stack_.back()->functions[typeclass] = id;
+    global_info_.typeclasses_.push_back(std::move(typeclass_info));
+  } else {
+    // error
+  }
+
+  return id;
 }
 
 std::optional<NamespaceInfo*> GlobalInfo::NamespaceVisitor::FindNamespace(const std::optional<std::vector<std::string>>& path) {
-  return FindSomething<NamespaceInfo>(path,
+  return FindSomething<NamespaceInfo*>(path,
       [] (NamespaceInfo* current_namespace) -> std::optional<NamespaceInfo*> {
     return current_namespace;
   });
@@ -88,22 +130,16 @@ std::optional<NamespaceInfo*> GlobalInfo::NamespaceVisitor::FindNamespace(const
 std::optional<utils::IdType> GlobalInfo::NamespaceVisitor::FindFunction(
     const std::optional<std::vector<std::string>>& path,
     const std::string& name) {
-  auto result = FindSomething<FunctionInfo>(path,
-      [name] (NamespaceInfo* current_namespace) -> std::optional<FunctionInfo*> {
+  return FindSomething<utils::IdType>(path,
+      [name] (NamespaceInfo* current_namespace) -> std::optional<utils::IdType> {
 
     auto function_info_iter = current_namespace->functions.find(name);
     if (function_info_iter == current_namespace->functions.end()) {
       return std::nullopt;
     }
 
-    return &function_info_iter->second;
+    return function_info_iter->second;
   });
-
-  if (result.has_value()) {
-    return global_info_.functions_.GetId(result.value());
-  } else {
-    return std::nullopt;
-  }
 }
 
 std::optional<utils::IdType> GlobalInfo::NamespaceVisitor::FindMethod(
@@ -112,8 +148,8 @@ std::optional<utils::IdType> GlobalInfo::NamespaceVisitor::FindMethod(
     const std::string& name) {
   // TODO: remove overhead
 
-  auto result = GlobalInfo::NamespaceVisitor::FindSomething<FunctionInfo>(path,
-      [type, name] (NamespaceInfo* current_namespace) -> std::optional<FunctionInfo*> {
+  return GlobalInfo::NamespaceVisitor::FindSomething<utils::IdType>(path,
+      [type, name] (NamespaceInfo* current_namespace) -> std::optional<utils::IdType> {
 
     auto variable_namespaces_iter = current_namespace->variable_namespaces.find(type);
     if (variable_namespaces_iter == current_namespace->variable_namespaces.end()) {
@@ -127,65 +163,47 @@ std::optional<utils::IdType> GlobalInfo::NamespaceVisitor::FindMethod(
         continue;
       }
 
-      return &method_iter->second;
+      return method_iter->second;
     }
 
     return std::nullopt;
   });
-
-  if (result.has_value()) {
-    return global_info_.functions_.GetId(result.value());
-  } else {
-    return std::nullopt;
-  }
 }
 
 std::optional<utils::IdType> GlobalInfo::NamespaceVisitor::FindType(
     const std::optional<std::vector<std::string>>& path,
     const std::string type) {
-  auto result = FindSomething<TypeInfo>(path,
-      [type] (NamespaceInfo* current_namespace) -> std::optional<TypeInfo*> {
+  return FindSomething<utils::IdType>(path,
+      [type] (NamespaceInfo* current_namespace) -> std::optional<utils::IdType> {
 
     auto type_info_iter = current_namespace->types.find(type);
     if (type_info_iter == current_namespace->types.end()) {
       return std::nullopt;
     }
 
-    return &type_info_iter->second;
+    return type_info_iter->second;
   });
-
-  if (result.has_value()) {
-    return global_info_.types_.GetId(result.value());
-  } else {
-    return std::nullopt;
-  }
 }
 
 std::optional<utils::IdType> GlobalInfo::NamespaceVisitor::FindTypeclass(
     const std::optional<std::vector<std::string>>& path,
     const std::string typeclass) {
-  auto result = FindSomething<TypeclassInfo>(path,
-      [typeclass] (NamespaceInfo* current_namespace) -> std::optional<TypeclassInfo*> {
+  return FindSomething<utils::IdType>(path,
+      [typeclass] (NamespaceInfo* current_namespace) -> std::optional<utils::IdType> {
 
     auto typeclass_info_iter = current_namespace->typeclasses.find(typeclass);
     if (typeclass_info_iter == current_namespace->typeclasses.end()) {
       return std::nullopt;
     }
 
-    return &typeclass_info_iter->second;
+    return typeclass_info_iter->second;
   });
-
-  if (result.has_value()) {
-    return global_info_.typeclasses_.GetId(result.value());
-  } else {
-    return std::nullopt;
-  }
 }
 
 template<typename T>
-std::optional<T*> GlobalInfo::NamespaceVisitor::FindSomething(
+std::optional<T> GlobalInfo::NamespaceVisitor::FindSomething(
     const std::optional<std::vector<std::string>>& path,
-    std::function<std::optional<T*>(NamespaceInfo*)> search_func) {
+    std::function<std::optional<T>(NamespaceInfo*)> search_func) {
   for (ssize_t i = namespace_stack_.size() - 1; i >= 0; --i) {
     NamespaceInfo* current_namespace = nullptr;
     if (path.has_value()) {
@@ -198,7 +216,7 @@ std::optional<T*> GlobalInfo::NamespaceVisitor::FindSomething(
       current_namespace = namespace_stack_[i];
     }
 
-    std::optional<T*> result = search_func(current_namespace);
+    std::optional<T> result = search_func(current_namespace);
 
     if (result.has_value()) {
       return result.value();